I've been trying to develop my relative pitch, and I've seen the suggestion of using "interval songs". This makes sense to me, but I've noticed something about every song I've seen suggested for the interval of a Perfect 4th: it's always the dominant to the tonic. This makes the tool more difficult to use in my head.
Can anyone recommend any pieces (the more well-known the better) that begin with the tonic to the subdominant?